Speaker



FIG. 1 is the front perspective view of a speaker showing our new design;

FIG. 2 is the front view thereof;

FIG. 3 is the rear view thereof;

FIG. 4 is the left-side view thereof;

FIG. 5 is the right-side view thereof;

FIG. 6 is the top plan view thereof; and,

FIG. 7 is the bottom plan view thereof.

The broken lines in the drawing show unclaimed environment only and form no part of the claimed design. 

CLAIM We claim the ornamental design for a speaker, as shown and described. 